From: Jakub Kicinski <kuba@kernel.org>
To: Saeed Mahameed <saeed@kernel.org>
Cc: Daniel Zahka <daniel.zahka@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>, Simon Horman <horms@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Srujana Challa <schalla@marvell.com>,
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Herbert Xu <herbert@gondor.apana.org.au>,
Brett Creeley <brett.creeley@amd.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
Michael Chan <michael.chan@broadcom.com>,
Pavan Chebbi <pavan.chebbi@broadcom.com>,
Tony Nguyen <anthony.l.nguyen@intel.com>,
Przemek Kitszel <przemyslaw.kitszel@intel.com>,
Sunil Goutham <sgoutham@marvell.com>,
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Tariq Toukan <tariqt@nvidia.com>,
Saeed Mahameed <saeedm@nvidia.com>,
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Ido Schimmel <idosch@nvidia.com>, Petr Machata <petrm@nvidia.com>,
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Subject: Re: [PATCH net-next v3 2/2] net/mlx5: implement swp_l4_csum_mode via devlink params
Date: Tue, 11 Nov 2025 07:34:12 -0800 [thread overview]
Message-ID: <20251111073412.5aa12e38@kernel.org> (raw)
In-Reply-To: <aRKu0Iknk0jftv2Z@x130>
On Mon, 10 Nov 2025 19:34:40 -0800 Saeed Mahameed wrote:
> On 10 Nov 15:01, Jakub Kicinski wrote:
> >On Fri, 7 Nov 2025 22:14:45 -0800 Saeed Mahameed wrote:
> >> Plug in the err, NL_SET_ERR_MSG_FMT_MOD(.., .., err);
> >> other locations as well.
> >
> >Incorrect. extack should basically be passed to perror()
> >IOW user space will add strerror(errno) after, anyway.
> >Adding the errno inside the string is pointless and ugly.
>
> ernno set by stack. err set by driver. we can't assume err will propagate
> to errno, this is up to the stack.
>
> And not at all ugly, very useful debug hint to the user, unless you
> guarantee err == errno.
Not propagating errno should be fixed, if that happens.
We need clear expectations to avoid the messages being all over
the place. Historically we haven't included err because formatting
was not an option. So I think we should continue this way.
next prev parent reply other threads:[~2025-11-11 15:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-07 20:43 [PATCH net-next v3 0/2] devlink: net/mlx5: implement swp_l4_csum_mode via devlink params Daniel Zahka
2025-11-07 20:43 ` [PATCH net-next v3 1/2] devlink: pass extack through to devlink_param::get() Daniel Zahka
2025-11-08 6:29 ` Saeed Mahameed
2025-11-07 20:43 ` [PATCH net-next v3 2/2] net/mlx5: implement swp_l4_csum_mode via devlink params Daniel Zahka
2025-11-08 6:14 ` Saeed Mahameed
2025-11-09 10:46 ` Jiri Pirko
2025-11-10 19:09 ` Daniel Zahka
2025-11-10 23:46 ` Jakub Kicinski
2025-11-11 3:26 ` Saeed Mahameed
2025-11-11 14:39 ` Jiri Pirko
2025-11-11 15:48 ` Jakub Kicinski
2025-11-12 12:55 ` Jiri Pirko
2025-11-11 15:19 ` Daniel Zahka
2025-11-10 23:01 ` Jakub Kicinski
2025-11-11 3:34 ` Saeed Mahameed
2025-11-11 15:34 ` Jakub Kicinski [this message]
2025-11-09 10:39 ` Jiri Pirko
2025-11-10 13:05 ` Daniel Zahka
2025-11-10 22:58 ` Jakub Kicinski
2025-11-11 14:40 ` Jiri Pirko
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